1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/epoll.h>
30 #include "load-fragment.h"
31 #include "load-dropin.h"
34 #include "mount-setup.h"
35 #include "unit-name.h"
37 #include "dbus-mount.h"
39 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
40 [MOUNT_DEAD] = UNIT_INACTIVE,
41 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
42 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
43 [MOUNT_MOUNTED] = UNIT_ACTIVE,
44 [MOUNT_REMOUNTING] = UNIT_ACTIVE_RELOADING,
45 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
46 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
47 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
48 [MOUNT_REMOUNTING_SIGTERM] = UNIT_ACTIVE_RELOADING,
49 [MOUNT_REMOUNTING_SIGKILL] = UNIT_ACTIVE_RELOADING,
50 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
51 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
52 [MOUNT_MAINTAINANCE] = UNIT_INACTIVE,
55 static const char* const state_string_table[_MOUNT_STATE_MAX] = {
56 [MOUNT_DEAD] = "dead",
57 [MOUNT_MOUNTING] = "mounting",
58 [MOUNT_MOUNTING_DONE] = "mounting-done",
59 [MOUNT_MOUNTED] = "mounted",
60 [MOUNT_REMOUNTING] = "remounting",
61 [MOUNT_UNMOUNTING] = "unmounting",
62 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
63 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
64 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
65 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
66 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
67 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
68 [MOUNT_MAINTAINANCE] = "maintainance"
71 static char *mount_name_from_where(const char *where) {
74 if (streq(where, "/"))
75 return strdup("-.mount");
77 return unit_name_build_escape(where+1, NULL, ".mount");
80 static void service_unwatch_control_pid(Mount *m) {
83 if (m->control_pid <= 0)
86 unit_unwatch_pid(UNIT(m), m->control_pid);
90 static void mount_parameters_done(MountParameters *p) {
97 p->what = p->options = p->fstype = NULL;
100 static void mount_done(Unit *u) {
108 mount_parameters_done(&m->parameters_etc_fstab);
109 mount_parameters_done(&m->parameters_proc_self_mountinfo);
110 mount_parameters_done(&m->parameters_fragment);
112 exec_context_done(&m->exec_context);
113 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
114 m->control_command = NULL;
116 service_unwatch_control_pid(m);
118 unit_unwatch_timer(u, &m->timer_watch);
121 static void mount_init(Unit *u) {
125 assert(u->meta.load_state == UNIT_STUB);
127 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
128 exec_context_init(&m->exec_context);
130 /* We need to make sure that /bin/mount is always called in
131 * the same process group as us, so that the autofs kernel
132 * side doesn't send us another mount request while we are
133 * already trying to comply its last one. */
134 m->exec_context.no_setsid = true;
136 m->timer_watch.type = WATCH_INVALID;
139 static int mount_notify_automount(Mount *m, int status) {
145 if (!(k = unit_name_change_suffix(UNIT(m)->meta.id, ".automount")))
148 p = manager_get_unit(UNIT(m)->meta.manager, k);
154 return automount_send_ready(AUTOMOUNT(p), status);
157 static int mount_add_node_links(Mount *m) {
165 /* Adds in links to the device that this node is based on */
167 if (m->parameters_fragment.what)
168 what = m->parameters_fragment.what;
169 else if (m->parameters_etc_fstab.what)
170 what = m->parameters_etc_fstab.what;
172 /* We observe kernel mounts only while they are live,
173 * hence don't create any links for them */
176 if (!path_startswith(what, "/dev/"))
179 if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
182 r = manager_load_unit(UNIT(m)->meta.manager, e, NULL, &device);
188 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, device)) < 0)
191 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, device)) < 0)
194 if (UNIT(m)->meta.manager->running_as == MANAGER_INIT ||
195 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)
196 if ((r = unit_add_dependency(device, UNIT_WANTS, UNIT(m))) < 0)
202 static int mount_add_path_links(Mount *m) {
208 /* Adds in link to other mount points, that might lie below or
209 * above us in the hierarchy */
211 LIST_FOREACH(units_per_type, other, UNIT(m)->meta.manager->units_per_type[UNIT_MOUNT]) {
219 if (m->meta.load_state != UNIT_LOADED)
222 if (path_startswith(m->where, n->where)) {
224 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(other))) < 0)
227 if (n->from_etc_fstab || n->from_fragment)
228 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(other))) < 0)
231 } else if (path_startswith(n->where, m->where)) {
233 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(other))) < 0)
236 if (m->from_etc_fstab || m->from_fragment)
237 if ((r = unit_add_dependency(UNIT(other), UNIT_REQUIRES, UNIT(m))) < 0)
245 static bool mount_test_option(const char *haystack, const char *needle) {
250 /* Like glibc's hasmntopt(), but works on a string, not a
257 me.mnt_opts = (char*) haystack;
259 return !!hasmntopt(&me, needle);
262 static int mount_add_target_links(Mount *m) {
272 if (m->from_fragment)
273 p = &m->parameters_fragment;
274 else if (m->from_etc_fstab)
275 p = &m->parameters_etc_fstab;
279 noauto = mount_test_option(p->options, MNTOPT_NOAUTO);
280 handle = mount_test_option(p->options, "comment=systemd.mount");
282 if (noauto && !handle)
285 if (mount_test_option(p->options, "_netdev") ||
286 fstype_is_network(p->fstype))
287 target = SPECIAL_REMOTE_FS_TARGET;
289 target = SPECIAL_LOCAL_FS_TARGET;
291 if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &u)) < 0)
295 if ((r = unit_add_dependency(u, UNIT_WANTS, UNIT(m))) < 0)
298 return unit_add_dependency(UNIT(m), UNIT_BEFORE, u);
301 static int mount_verify(Mount *m) {
306 if (UNIT(m)->meta.load_state != UNIT_LOADED)
310 log_error("%s lacks Where setting. Refusing.", UNIT(m)->meta.id);
314 path_kill_slashes(m->where);
316 if (!(e = mount_name_from_where(m->where)))
319 b = unit_has_name(UNIT(m), e);
323 log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id);
330 static int mount_load(Unit *u) {
335 assert(u->meta.load_state == UNIT_STUB);
337 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
340 /* This is a new unit? Then let's add in some extras */
341 if (u->meta.load_state == UNIT_LOADED) {
343 /* Minor validity checking */
344 if ((m->parameters_fragment.options || m->parameters_fragment.fstype) && !m->parameters_fragment.what)
347 if (m->parameters_fragment.what)
348 m->from_fragment = true;
350 if ((r = mount_add_node_links(MOUNT(u))) < 0)
353 if ((r = mount_add_path_links(MOUNT(u))) < 0)
356 if ((r = mount_add_target_links(MOUNT(u))) < 0)
359 if ((r = unit_add_default_cgroup(u)) < 0)
363 return mount_verify(m);
366 static void mount_set_state(Mount *m, MountState state) {
367 MountState old_state;
370 old_state = m->state;
373 if (state != MOUNT_MOUNTING &&
374 state != MOUNT_MOUNTING_DONE &&
375 state != MOUNT_REMOUNTING &&
376 state != MOUNT_UNMOUNTING &&
377 state != MOUNT_MOUNTING_SIGTERM &&
378 state != MOUNT_MOUNTING_SIGKILL &&
379 state != MOUNT_UNMOUNTING_SIGTERM &&
380 state != MOUNT_UNMOUNTING_SIGKILL &&
381 state != MOUNT_REMOUNTING_SIGTERM &&
382 state != MOUNT_REMOUNTING_SIGKILL) {
383 unit_unwatch_timer(UNIT(m), &m->timer_watch);
384 service_unwatch_control_pid(m);
385 m->control_command = NULL;
388 if (state == MOUNT_MOUNTED ||
389 state == MOUNT_REMOUNTING)
390 mount_notify_automount(m, 0);
391 else if (state == MOUNT_DEAD ||
392 state == MOUNT_UNMOUNTING ||
393 state == MOUNT_MOUNTING_SIGTERM ||
394 state == MOUNT_MOUNTING_SIGKILL ||
395 state == MOUNT_REMOUNTING_SIGTERM ||
396 state == MOUNT_REMOUNTING_SIGKILL ||
397 state == MOUNT_UNMOUNTING_SIGTERM ||
398 state == MOUNT_UNMOUNTING_SIGKILL ||
399 state == MOUNT_MAINTAINANCE)
400 mount_notify_automount(m, -ENODEV);
402 if (state != old_state)
403 log_debug("%s changed %s → %s", UNIT(m)->meta.id, state_string_table[old_state], state_string_table[state]);
405 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
408 static int mount_coldplug(Unit *u) {
412 assert(m->state == MOUNT_DEAD);
414 if (m->from_proc_self_mountinfo)
415 mount_set_state(m, MOUNT_MOUNTED);
420 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
428 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
431 if ((r = exec_spawn(c,
437 UNIT(m)->meta.manager->confirm_spawn,
438 UNIT(m)->meta.cgroup_bondings,
442 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
443 /* FIXME: we need to do something here */
451 unit_unwatch_timer(UNIT(m), &m->timer_watch);
456 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
463 if (m->from_proc_self_mountinfo)
464 p = &m->parameters_proc_self_mountinfo;
465 else if (m->from_fragment)
466 p = &m->parameters_fragment;
468 p = &m->parameters_etc_fstab;
471 "%sMount State: %s\n"
474 "%sFile System Type: %s\n"
476 "%sFrom /etc/fstab: %s\n"
477 "%sFrom /proc/self/mountinfo: %s\n"
478 "%sFrom fragment: %s\n"
480 prefix, state_string_table[m->state],
482 prefix, strna(p->what),
483 prefix, strna(p->fstype),
484 prefix, strna(p->options),
485 prefix, yes_no(m->from_etc_fstab),
486 prefix, yes_no(m->from_proc_self_mountinfo),
487 prefix, yes_no(m->from_fragment),
488 prefix, kill_mode_to_string(m->kill_mode));
490 if (m->control_pid > 0)
492 "%sControl PID: %llu\n",
493 prefix, (unsigned long long) m->control_pid);
495 exec_context_dump(&m->exec_context, f, prefix);
498 static void mount_enter_dead(Mount *m, bool success) {
504 mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
507 static void mount_enter_mounted(Mount *m, bool success) {
513 mount_set_state(m, MOUNT_MOUNTED);
516 static void mount_enter_signal(Mount *m, MountState state, bool success) {
525 if (m->kill_mode != KILL_NONE) {
526 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
527 state == MOUNT_UNMOUNTING_SIGTERM ||
528 state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
530 if (m->kill_mode == KILL_CONTROL_GROUP) {
532 if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
533 if (r != -EAGAIN && r != -ESRCH)
539 if (!sent && m->control_pid > 0)
540 if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
547 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
550 mount_set_state(m, state);
551 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
552 mount_enter_mounted(m, true);
554 mount_enter_dead(m, true);
559 log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r));
561 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
562 mount_enter_mounted(m, false);
564 mount_enter_dead(m, false);
567 static void mount_enter_unmounting(Mount *m, bool success) {
576 m->control_command = c = m->exec_command + MOUNT_EXEC_UNMOUNT;
578 if ((r = exec_command_set(
585 service_unwatch_control_pid(m);
587 if ((r = mount_spawn(m, c, &m->control_pid)) < 0)
590 mount_set_state(m, MOUNT_UNMOUNTING);
595 log_warning("%s failed to run umount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
596 mount_enter_mounted(m, false);
599 static void mount_enter_mounting(Mount *m) {
605 m->control_command = c = m->exec_command + MOUNT_EXEC_MOUNT;
607 if (m->from_fragment)
608 r = exec_command_set(
611 m->parameters_fragment.what,
613 "-t", m->parameters_fragment.fstype,
614 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
616 else if (m->from_etc_fstab)
617 r = exec_command_set(
628 service_unwatch_control_pid(m);
630 if ((r = mount_spawn(m, c, &m->control_pid)) < 0)
633 mount_set_state(m, MOUNT_MOUNTING);
638 log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
639 mount_enter_dead(m, false);
642 static void mount_enter_mounting_done(Mount *m) {
645 mount_set_state(m, MOUNT_MOUNTING_DONE);
648 static void mount_enter_remounting(Mount *m, bool success) {
657 m->control_command = c = m->exec_command + MOUNT_EXEC_REMOUNT;
659 if (m->from_fragment) {
663 if (m->parameters_fragment.options) {
664 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
673 r = exec_command_set(
676 m->parameters_fragment.what,
678 "-t", m->parameters_fragment.fstype,
683 } else if (m->from_etc_fstab)
684 r = exec_command_set(
698 service_unwatch_control_pid(m);
700 if ((r = mount_spawn(m, c, &m->control_pid)) < 0)
703 mount_set_state(m, MOUNT_REMOUNTING);
708 mount_enter_mounted(m, false);
711 static int mount_start(Unit *u) {
716 /* We cannot fulfill this request right now, try again later
718 if (m->state == MOUNT_UNMOUNTING ||
719 m->state == MOUNT_UNMOUNTING_SIGTERM ||
720 m->state == MOUNT_UNMOUNTING_SIGKILL)
724 if (m->state == MOUNT_MOUNTING ||
725 m->state == MOUNT_MOUNTING_SIGTERM ||
726 m->state == MOUNT_MOUNTING_SIGKILL)
729 assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE);
733 mount_enter_mounting(m);
737 static int mount_stop(Unit *u) {
742 /* Cann't do this right now. */
743 if (m->state == MOUNT_MOUNTING ||
744 m->state == MOUNT_MOUNTING_DONE ||
745 m->state == MOUNT_MOUNTING_SIGTERM ||
746 m->state == MOUNT_MOUNTING_SIGKILL ||
747 m->state == MOUNT_REMOUNTING ||
748 m->state == MOUNT_REMOUNTING_SIGTERM ||
749 m->state == MOUNT_REMOUNTING_SIGKILL)
753 if (m->state == MOUNT_UNMOUNTING ||
754 m->state == MOUNT_UNMOUNTING_SIGKILL ||
755 m->state == MOUNT_UNMOUNTING_SIGTERM)
758 assert(m->state == MOUNT_MOUNTED);
760 mount_enter_unmounting(m, true);
764 static int mount_reload(Unit *u) {
769 if (m->state == MOUNT_MOUNTING_DONE)
772 assert(m->state == MOUNT_MOUNTED);
774 mount_enter_remounting(m, true);
778 static UnitActiveState mount_active_state(Unit *u) {
781 return state_translation_table[MOUNT(u)->state];
784 static const char *mount_sub_state_to_string(Unit *u) {
787 return state_string_table[MOUNT(u)->state];
790 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
797 success = code == CLD_EXITED && status == 0;
798 m->failure = m->failure || !success;
800 assert(m->control_pid == pid);
801 assert(m->control_command);
803 exec_status_fill(&m->control_command->exec_status, pid, code, status);
806 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
808 /* Note that mount(8) returning and the kernel sending us a
809 * mount table change event might happen out-of-order. If an
810 * operation succeed we assume the kernel will follow soon too
811 * and already change into the resulting state. If it fails
812 * we check if the kernel still knows about the mount. and
813 * change state accordingly. */
818 case MOUNT_MOUNTING_DONE:
819 case MOUNT_MOUNTING_SIGKILL:
820 case MOUNT_MOUNTING_SIGTERM:
821 case MOUNT_REMOUNTING:
822 case MOUNT_REMOUNTING_SIGKILL:
823 case MOUNT_REMOUNTING_SIGTERM:
825 if (success && m->from_proc_self_mountinfo)
826 mount_enter_mounted(m, true);
827 else if (m->from_proc_self_mountinfo)
828 mount_enter_mounted(m, false);
830 mount_enter_dead(m, false);
833 case MOUNT_UNMOUNTING:
834 case MOUNT_UNMOUNTING_SIGKILL:
835 case MOUNT_UNMOUNTING_SIGTERM:
838 mount_enter_dead(m, true);
839 else if (m->from_proc_self_mountinfo)
840 mount_enter_mounted(m, false);
842 mount_enter_dead(m, false);
846 assert_not_reached("Uh, control process died at wrong time.");
850 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
854 assert(elapsed == 1);
855 assert(w == &m->timer_watch);
860 case MOUNT_MOUNTING_DONE:
861 log_warning("%s mounting timed out. Stopping.", u->meta.id);
862 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
865 case MOUNT_REMOUNTING:
866 log_warning("%s remounting timed out. Stopping.", u->meta.id);
867 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
870 case MOUNT_UNMOUNTING:
871 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
872 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
875 case MOUNT_MOUNTING_SIGTERM:
876 log_warning("%s mounting timed out. Killing.", u->meta.id);
877 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
880 case MOUNT_REMOUNTING_SIGTERM:
881 log_warning("%s remounting timed out. Killing.", u->meta.id);
882 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
885 case MOUNT_UNMOUNTING_SIGTERM:
886 log_warning("%s unmounting timed out. Killing.", u->meta.id);
887 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
890 case MOUNT_MOUNTING_SIGKILL:
891 case MOUNT_REMOUNTING_SIGKILL:
892 case MOUNT_UNMOUNTING_SIGKILL:
893 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
895 if (m->from_proc_self_mountinfo)
896 mount_enter_mounted(m, false);
898 mount_enter_dead(m, false);
902 assert_not_reached("Timeout at wrong time.");
906 static int mount_add_one(
912 bool from_proc_self_mountinfo,
917 char *e, *w = NULL, *o = NULL, *f = NULL;
926 assert(!set_flags || from_proc_self_mountinfo);
928 /* Ignore API mount points. They should never be referenced in
929 * dependencies ever. */
930 if (mount_point_is_api(where))
933 if (streq(fstype, "autofs"))
936 /* probably some kind of swap, which we don't cover for now */
940 e = mount_name_from_where(where);
945 if (!(u = manager_get_unit(m, e))) {
948 if (!(u = unit_new(m))) {
953 r = unit_add_name(u, e);
959 if (!(MOUNT(u)->where = strdup(where))) {
964 if ((r = unit_set_description(u, where)) < 0)
967 unit_add_to_load_queue(u);
973 if (!(w = strdup(what)) ||
974 !(o = strdup(options)) ||
975 !(f = strdup(fstype))) {
980 if (from_proc_self_mountinfo) {
981 mp = &MOUNT(u)->parameters_proc_self_mountinfo;
984 MOUNT(u)->is_mounted = true;
985 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
986 MOUNT(u)->just_changed = !streq_ptr(MOUNT(u)->parameters_proc_self_mountinfo.options, o);
989 MOUNT(u)->from_proc_self_mountinfo = true;
992 mp = &MOUNT(u)->parameters_etc_fstab;
994 MOUNT(u)->from_etc_fstab = true;
1006 unit_add_to_dbus_queue(u);
1021 static char *fstab_node_to_udev_node(char *p) {
1025 /* FIXME: to follow udev's logic 100% we need to leave valid
1026 * UTF8 chars unescaped */
1028 if (startswith(p, "LABEL=")) {
1030 if (!(t = xescape(p+6, "/ ")))
1033 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1042 if (startswith(p, "UUID=")) {
1044 if (!(t = xescape(p+5, "/ ")))
1047 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1059 static int mount_load_etc_fstab(Manager *m) {
1067 if (!(f = setmntent("/etc/fstab", "r")))
1070 while ((me = getmntent(f))) {
1073 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1078 if (!(where = strdup(me->mnt_dir))) {
1085 path_kill_slashes(what);
1087 if (where[0] == '/')
1088 path_kill_slashes(where);
1090 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1105 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1107 char *device, *path, *options, *fstype, *d, *p;
1111 rewind(m->proc_self_mountinfo);
1116 device = path = options = fstype = d = p = NULL;
1118 if ((k = fscanf(m->proc_self_mountinfo,
1119 "%*s " /* (1) mount id */
1120 "%*s " /* (2) parent id */
1121 "%*s " /* (3) major:minor */
1122 "%*s " /* (4) root */
1123 "%ms " /* (5) mount point */
1124 "%ms" /* (6) mount options */
1125 "%*[^-]" /* (7) optional fields */
1126 "- " /* (8) seperator */
1127 "%ms " /* (9) file system type */
1128 "%ms" /* (10) mount source */
1129 "%*[^\n]", /* some rubbish at the end */
1142 if (!(d = cunescape(device)) ||
1143 !(p = cunescape(path))) {
1148 if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
1172 static void mount_shutdown(Manager *m) {
1175 if (m->proc_self_mountinfo)
1176 fclose(m->proc_self_mountinfo);
1179 static int mount_enumerate(Manager *m) {
1181 struct epoll_event ev;
1184 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "r")))
1187 m->mount_watch.type = WATCH_MOUNT;
1188 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1191 ev.events = EPOLLERR;
1192 ev.data.ptr = &m->mount_watch;
1194 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1197 if ((r = mount_load_etc_fstab(m)) < 0)
1200 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1210 void mount_fd_event(Manager *m, int events) {
1215 assert(events == EPOLLERR);
1217 /* The manager calls this for every fd event happening on the
1218 * /proc/self/mountinfo file, which informs us about mounting
1221 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1222 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-errno));
1224 /* Reset flags, just in case, for later calls */
1225 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1226 Mount *mount = (Mount*) meta;
1228 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1234 manager_dispatch_load_queue(m);
1236 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1237 Mount *mount = (Mount*) meta;
1239 if (!mount->is_mounted) {
1240 /* This has just been unmounted. */
1242 mount->from_proc_self_mountinfo = false;
1244 switch (mount->state) {
1247 mount_enter_dead(mount, true);
1251 mount_set_state(mount, mount->state);
1256 } else if (mount->just_mounted || mount->just_changed) {
1258 /* New or changed entrymount */
1260 switch (mount->state) {
1263 case MOUNT_MAINTAINANCE:
1264 mount_enter_mounted(mount, true);
1267 case MOUNT_MOUNTING:
1268 mount_enter_mounting_done(mount);
1272 /* Nothing really changed, but let's
1273 * issue an notification call
1274 * nonetheless, in case somebody is
1275 * waiting for this. (e.g. file system
1276 * ro/rw remounts.) */
1277 mount_set_state(mount, mount->state);
1282 /* Reset the flags for later calls */
1283 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1287 int mount_path_is_mounted(Manager *m, const char* path) {
1297 if (!(t = strdup(path)))
1300 path_kill_slashes(t);
1306 if (!(e = mount_name_from_where(t))) {
1311 u = manager_get_unit(m, e);
1315 (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1316 MOUNT(u)->state != MOUNT_MOUNTED) {
1321 assert_se(slash = strrchr(t, '/'));
1338 const UnitVTable mount_vtable = {
1342 .no_instances = true,
1348 .coldplug = mount_coldplug,
1352 .start = mount_start,
1354 .reload = mount_reload,
1356 .active_state = mount_active_state,
1357 .sub_state_to_string = mount_sub_state_to_string,
1359 .sigchld_event = mount_sigchld_event,
1360 .timer_event = mount_timer_event,
1362 .bus_message_handler = bus_mount_message_handler,
1364 .enumerate = mount_enumerate,
1365 .shutdown = mount_shutdown